From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B6D6DCF2588 for ; Wed, 19 Nov 2025 07:33:05 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 2400C6B00A5; Wed, 19 Nov 2025 02:33:05 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 2178F6B00A6; Wed, 19 Nov 2025 02:33:05 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 154EC6B00A8; Wed, 19 Nov 2025 02:33:05 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 046246B00A5 for ; Wed, 19 Nov 2025 02:33:05 -0500 (EST) Received: from smtpin01.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 14AAE12F09E for ; Wed, 19 Nov 2025 07:33:03 +0000 (UTC) X-FDA: 84126540246.01.C01B43D Received: from out-180.mta0.migadu.com (out-180.mta0.migadu.com [91.218.175.180]) by imf26.hostedemail.com (Postfix) with ESMTP id 5A9F814000B for ; Wed, 19 Nov 2025 07:33:01 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b="YWY8Wd/h"; spf=pass (imf26.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.180 as permitted sender) smtp.mailfrom=qi.zheng@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1763537581; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=xbQut2RAeaEKXRoxc7PGnBbX+lTx58XUfxm/tIDziS4=; b=eXQ7fiCk+5uHfyo8ZjQXBYobaovrBUC9LIIp0BMTuma0bsJaTSEf4AJjuZb6hFpoAH99ra bEgg5tfPHi80vklI6uueornf7Mwo1WEoouqB17+QNnR2EUBzPOYZYd93PYHiBAXkwNWFZn XjPQxHpu6pJ0T4+IZK6Y8JGUQtJ/d10= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b="YWY8Wd/h"; spf=pass (imf26.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.180 as permitted sender) smtp.mailfrom=qi.zheng@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1763537581; a=rsa-sha256; cv=none; b=378CF1hEiaWLDghtHx/Ps0/VnYYUSaZNIMUxU18EzabRhNcR612wKbXQGHbTiLI0roiQ7P AESViyJK4iqF21L6E/jsZaqySp+jsyezI3A1DWOO+Yd5NAEFn+S9pYgittU+j+KwO/CLng j88N7hKCrHn+w/1wKhdny28tHEdnVj4= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1763537579; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xbQut2RAeaEKXRoxc7PGnBbX+lTx58XUfxm/tIDziS4=; b=YWY8Wd/hFhv3CZWBDDzWNHWU3c4vCOTDJZW/mEzfM0Wlf7hnGTSivFcCRJ9xyCe64ovTmd byPLPVtAT4GqYNj4gNPzHf5ibj7aP2MQEmdYxkGBgLDrH/5Ncl2qWFYZmMJp+cJyyYj/NQ 72JNhTJaov0NSjtaGyaV32a2xS5LLUE= From: Qi Zheng To: will@kernel.org, aneesh.kumar@kernel.org, npiggin@gmail.com, peterz@infradead.org, dev.jain@arm.com, akpm@linux-foundation.org, david@kernel.org, ioworker0@gmail.com, linmag7@gmail.com Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-alpha@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-um@lists.infradead.org, Qi Zheng , Huacai Chen , WANG Xuerui Subject: [PATCH v2 3/7] LoongArch: mm: enable MMU_GATHER_RCU_TABLE_FREE Date: Wed, 19 Nov 2025 15:31:20 +0800 Message-ID: <0e12d201cc18a970c28c84030a0d79f5bda492ca.1763537007.git.zhengqi.arch@bytedance.com> In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: 5A9F814000B X-Stat-Signature: 9qceymo8dmfignajoey7ysnxcdq3644c X-Rspamd-Server: rspam02 X-Rspam-User: X-HE-Tag: 1763537581-211083 X-HE-Meta: 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 sdmdhPT1 zEtx3eHPcvAnahmDNChVRGNgvFT8G4oeskFbTbPvqtyDE60db25EiG9XTOUWk+CQNmmuFXE/KYAzRn9b3BhZ5vWBtBJ5ayIAbYHOAYOIsf7WOUmaHtSe39uIvmFnQA3PbHNLwQk0IaYZ//aAnlGSTxZ0oSiwm3kuelbGJtHkcIqEGemqpT0A93GnQ1mUOFHfAhVZHjQCfoInHQOGKO1qQEjSu6Z3hDxmB+B0fOdgwUtajYtqq8Zlrl1ji/wjh2F3EAcDHkaRx2jYxiEPuJynRUikttf6ZVtlQFPEW X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Qi Zheng On a 64-bit system, madvise(MADV_DONTNEED) may cause a large number of empty PTE page table pages (such as 100GB+). To resolve this problem, first enable MMU_GATHER_RCU_TABLE_FREE to prepare for enabling the PT_RECLAIM feature, which resolves this problem. Signed-off-by: Qi Zheng Cc: Huacai Chen Cc: WANG Xuerui --- arch/loongarch/Kconfig | 1 + arch/loongarch/include/asm/pgalloc.h | 7 +++---- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 5b1116733d881..57d3e199605dc 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -186,6 +186,7 @@ config LOONGARCH select IRQ_LOONGARCH_CPU select LOCK_MM_AND_FIND_VMA select MMU_GATHER_MERGE_VMAS if MMU + select MMU_GATHER_RCU_TABLE_FREE select MODULES_USE_ELF_RELA if MODULES select NEED_PER_CPU_EMBED_FIRST_CHUNK select NEED_PER_CPU_PAGE_FIRST_CHUNK diff --git a/arch/loongarch/include/asm/pgalloc.h b/arch/loongarch/include/asm/pgalloc.h index 08dcc698ec184..248f62d0b590e 100644 --- a/arch/loongarch/include/asm/pgalloc.h +++ b/arch/loongarch/include/asm/pgalloc.h @@ -55,8 +55,7 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm) return pte; } -#define __pte_free_tlb(tlb, pte, address) \ - tlb_remove_ptdesc((tlb), page_ptdesc(pte)) +#define __pte_free_tlb(tlb, pte, address) tlb_remove_ptdesc((tlb), page_ptdesc(pte)) #ifndef __PAGETABLE_PMD_FOLDED @@ -79,7 +78,7 @@ static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) return pmd; } -#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x) +#define __pmd_free_tlb(tlb, x, addr) tlb_remove_ptdesc((tlb), virt_to_ptdesc(x)) #endif @@ -99,7 +98,7 @@ static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address) return pud; } -#define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x) +#define __pud_free_tlb(tlb, x, addr) tlb_remove_ptdesc((tlb), virt_to_ptdesc(x)) #endif /* __PAGETABLE_PUD_FOLDED */ -- 2.20.1